<template>
  <div id="app">
    <!-- 头部 -->
    <mt-header fixed title="固定在顶部">
      <span slot="left" @click="goback" v-show="showback">
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>
    <!-- 路由占位 -->
    <transition>
      <router-view></router-view>
    </transition>
    <!-- 底部 -->
    <nav class="mui-bar mui-bar-tab">
      <router-link class="mui-tab-item-llb" to="/home">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="mui-tab-item-llb" to="/member">
        <span class="mui-icon mui-icon-contact">
        </span>
        <span class="mui-tab-label">会员</span>
      </router-link>
      <router-link class="mui-tab-item-llb" to="/shopcar">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart">
          <span class="mui-badge" id="badge">{{$store.getters.getAllCount}}</span>
        </span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="mui-tab-item-llb" to="/search">
        <span class="mui-icon mui-icon-search"></span>
        <span class="mui-tab-label">搜索</span>
      </router-link>
    </nav>

  </div>
</template>

<script>
export default {
  name: 'App',
  data () {
    return {
      showback: false
    }
  },
  created () {
    this.showback = this.$route.path === '/home'? false : true
  },
  methods: {
    goback () {
      this.$router.go(-1)
    }
  },
  watch: {
    "$route.path": function (newval) {
      if (newval === '/home') {
        this.showback = false
      } else {
        this.showback = true
      }
    }
  }
}
</script>

<style lang="scss" scoped>
  #app {
    padding-top: 40px;
    padding-bottom: 60px;
    overflow-x: hidden;
  }
  .v-enter {
    opacity: 0;
    transform: translateX(100%);
  }
  .v-leave-to {
    opacity: 0;
    transform: translateX(-100%);
    position: absolute;
  }
  .v-leave-active,
  .v-enter-active {
    transition: all 0.3s ease;
  }
  /* 该类名，解决 tabbar 点击无法切换的问题 */
  .mui-bar-tab .mui-tab-item-llb.mui-active {
    color: #007aff;
  }
  .mui-bar-tab .mui-tab-item-llb {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
  }
  .mui-bar-tab .mui-tab-item-llb .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
  }
  .mui-bar-tab .mui-tab-item-llb .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
  }
</style>
